Caption: Coral spawning. Image courtesy Australian Institute of Marine Science.
Enhanced coral performance
Seeding enhanced corals from existing stock by larval slick translocation
Small (a few hectares, a single reef) to medium (20 or more reefs)
There is significant genetic diversity within and among populations of many coral species on the Great Barrier Reef.
Enhanced coral performance interventions are also known as ‘assisted evolution’ as they aim to facilitate the sharing of this genetic diversity; to transfer desirable traits – such as heat tolerance, growth and fecundity – between coral species and populations.
Corals that survive mass-bleaching events, or those that thrive on naturally-warm reefs, are likely to possess heat-resistant genes.
This potential intervention aims to enhance the adaptation of local populations to expected future conditions by moving naturally warm-adapted corals (adults, fragments, spawn, larvae or juveniles) to reefs with less heat-resistant individuals.
High priority reefs would be seeded with natural coral stock captured into tanks during coral spawning and transported via large vessels. This aims to increase the number of corals from the spawning slick that ultimately recruit into reef populations.
This captured coral stock may receive additional treatments such as: